<style>
    .article2{
        margin: 0 auto;
        width: 600px;
        border: solid 1px #d9d9d9;
        box-shadow: 2px 2px 2px #999999;
        margin-top: 50px;
        margin-bottom: 50px;
    }
    .form{
        width: 500px;
        margin: 0 auto;
    }
</style>
<div class="article2">
    <div class="form">
        <h2 style="text-align: center">登录</h2>
        <div class="clr"></div>
        <form action="#" method="post" id="sendemail">
            <ol>
                <li>
                    <label for="username">用户名 (required)</label>
                    <input id="username" name="username" class="text" type="text"/>
                </li>
                <li>
                    <label for="vercode">验证码 (required)</label>
                    <input id="vercode" name="vercode" class="text" type="text"/>\
                    <img src="__URL__/vercode">
                </li>
                <li>
                    <label for="password">密码 (required)</label>
                    <input id="password" name="password" class="text" type="password"/>
                </li>
                <li>
                    <input type="image" name="imageField" id="imageField" src="IMAGEPath/submit.gif" class="send"/>
                    <div class="clr"></div>
                </li>
            </ol>
        </form>
    </div>
</div>